136112-70-4 2,9-Bis(4-nitrophenyl)-9H-purin-6-amine 2,9-Bis(p-nitrophenyl)adenine 2,N(sup 9)-Bis(p-nitrophenyl)adenine 9H-Purin-6-amine, 2,9-bis(4-nitrophenyl)- CCRIS 5375